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3 Sheets-Sheet 1.A

(No Model.)

C. M. LUNGREN. REGBNBRATIVE GAS LAMP.

No. 357,962. Patented Feb. 15, 1887@ INVENTOR Wl T NESSES A T'TORNEY 3sheetssheet 2.

(No Model.)

G. M. LUNGREN. REGENERATIVB GAS LAMP.

Patented Peb. 15, 1887.

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ATTHIVEY UNITED STATES PATENT OFFICE.

CHARLES M. LUNGREN, OF NEV YORK, N. Y.

REGENERATIVE GAS-LAM P.

SPECIFICATION forming part of Letters Patent No. 357,962, dated February15, 1887.

Application filed February 20, 1886. Serial No. 192,632.

To all whom it may concern: I

Be it known that I, CHARLEs M. LUNGREN, a citizen of the United States,and a resident Yof New York, in the county of New York and State of NewYork, have invented certain new and useful Regenerative Gas-Lamps, ofwhich the following is a specification.

The chief difficulty experienced with regenerative gas-lamps asheretofore constructed has been the clogging of the gas-burner portionof the apparatus, due to its overheating. In some forms of these lampsthe gasburner hangs within the hot-air chamber, and in others itsurrounds the central flue through which the hot products of combustionescape. In both cases it is in proximity to the hot metal air-heatingsurfaces, and is, moreover, washed by the currents of highly-heated airin their passage to the flame.

It is the object of this invention to provide a construction ofregenerative lamp in which, while the air is very completely exposed tothe heat of the dame and escaping products of combustion, the gasburnerpart of the apparatus will not become sufiiciently heated to decomposethe gas or combustible vapor passing through it. To accomplish thisIplace the gas-burner below the fiame, and cause the air entering tosupply the iiame to pass through and around it before such air has beenexposed to the heatof the flame and products of combustion. The air tosupply the interior of the flame, after passing through the burner andbecoming partially heated by contact with the same, is admitted into theupper portion of an air-heating chamber located within the flame andextending any desired dist-ance up into the escape-due. This air passesfrom the upper portion of this chamber downward, in contact with its hotexternal wall, to its mouth, from which it issues upon the iiame a shortdistance above the burner-tip. This airheating chamber, being locatedwithin the iiame and the current of hot products of combustion, is inthe most favorable position for an intercha-nge of heat between it andthe escaping gases. From the manner in which itis supported it can,moreover, part with but a small amount of the heat by conduction throughthe support, and the main portion of this will be yielded up to theentering air.

In the drawings, Figures 1, 2, and 3 show (No model.)

three forms of the lamp, differing from each othervin certain details ofconstruction. Fig. 4 is a plan of the device by which the cylindricalcasing carrying the globe is supported.

In Fig. l, C is an annular burner having at its upper end a tip c c',for the emission of gas or combustible vapor. The gas-openings may bearound the periphery of its tip, as shown in Figs, l and 3, or they maybe on its upper surface, as shown in Fig. 2. The gas may issue from aring of holes, a circular slit, or other form of opening.

A is an air-heating chamber supported within the flame by the air-tubeB. This tube is provided with openings b b, through which the airpassing up through the center of the burner finds its way into thechamber A. In this chamber it becomes highly heated by contact with itshot external wall, and then issues from its lower end upon the flame F.A casing, D, surrounding the burner O, serves to convey air to the underside of the fiame at its root. The lame is inclosed in a glass globe,

H, which rests upon the supporting-cylinder.

E, through which additional air is admitted to the under side of theiiame. This cylinder E is shown supported upon the shell D by means of abayonet-joint. TheshellDis flared at the bottom and provided withnotches d, while E is provided with offsets ce, which pass through thenotches in D and rest upon its dared part when the shell E is in place.To properly break up the aircurrents and protect the burner from drafts,the bottom of Eis shown as provided with a perforated cap, E. Thegas-burner C, as shown, consists of two concentric shells connected tothe central gassupply pipe, G, by the lateral arms g g.

S is the stop-cock, operated by the key K.

Theburner may also consist of a circle of bat-wing or fishtail jets.

H represents a metal chimney seated upon the globe at h h, and attachedto the central gas-supply pipe by the arms h h. This chimney may beformed by an extension of the glass; but it is preferably made of metal,as shown.

Nhile the construction so far described answers for lamps of small gasconsumption, itis not adapted to those using large amounts of gas, inwhich it is necessary to protect the inclosingglass from the great heatof the flame,

ICO

and also to more completely protect the burnertip from overheating.

Figs. 2 and 3 show forms of lamp in which provision is made forprotecting both the inclosing-glass and the burner from the heat of theflame.

To prevent the burnertip from becoming overheated, the central air-tube,B, upon which the air-chamber A rests, is made of a less diameter thanthe inner wall of the burner C, so that there is an annular air-spacebetween the two. The tube B is also provided with a collar, b', locatedabove the burner-tip, which serves to deflect the air passing up betweenB and the inner wall of the burner upon the flame, and also acts as ascreen to protect the tip from the direct heat of the iiame.

To protect the globe from the heat of the flame, the escape-flueislocated in such a rela tion to the iiaine that its ends will be sweptin away from the glass, and an air-passage is arranged between the globeand the escape-flue, by means of which the upper part of the globe iswashed by a current oi" comparatively cool air.

In Fig. 2, C is an annular burner provided with a tip having gas-holeson its upper side. It screws into the ring G, which is connected to thecentral gas-supply pipe, G, by the three arms g. A casing, E2,perforated at its upper end, regulates the amount of air admitted to theoutside of the flame. It supports the casing D, which directs air uponthe flame at its root, and also serves to support the cylindricalglobe-support E, which rests upon the bead at its lower end by means ofthe offsets e2, the bead being out away in three places, as indicated inFig. 4, to allow of the passage of its oifsets e2 in removing the globe.

B is the central air-tube, through which the air to supply the interiorof the flame is admitted. It is provided with an annular oset or collar,b', and supports the air-heating chamber A by means of the perforatedcuppiece a. A cap, A', serves to make a tight joint between A and thegassupply pipe G. The neck of the globe H enters the annular spaceformed between the outer wall, I', of the head-plateI of the lamp andthe wall J of the U-shaped piece, of which the inner wall forms thelower portion of the escape-flue. The head-plate I is perforated, asshown, to admit air. This is caused to travel downward and come incontact with the heated surface J before passing into the globe by therim i. It then passes along the inside of the neck of the globe andprevents this becoming over,- heated. A loose ring, m, serves to make atight joint between the globe and wall l,while allowing for inequalitiesin the globes.

H is the chimney, and H2 sheathing, which may be of ornamental design.

l? is an ornamental crown.

In Fig. 3 the construction of the gasburner portion of the lamp and thesurrounding aircasings is the same as that shown in Fig. l, save thatthe gas-holes are shown on the periphery instead of the top of the tip.The airheating chamber B is in this case shown extended up into theescape-flue, so as to be more completely exposed to the heating effectsof the escaping products of combustion. It is supported upon theair-tube B by the perforated piece a, and closed at the top by the capA. In `the construction shown in this figure the air to cool the neck ofthe globe enters at the outside surface of the globe-neck and passes upover its upper end and then down along its inside surface, thus veryeffectually keeping it cool. 'A sliding ring, m, having perforationsnear its lower edge, serves to make a tight joint with the globe andlimit the amount of air allowed to enter at this point.

The wall of the escape-flue .I may be provided with a non-conductinglining, N, of asbestus or similar material, to prevent the loss of heatfrom the escaping gases through the walls of the escape-flue. As in Fig.2, H is the chimney,and H2 an ornamental sheathing to the same, and P anornamental crown.

The air-chamberA is preferably constructed of porcelain or of similarrefractory material, though it may be made of metal with a whitenedsurface.

In my Application No. 192,633, led February 20, 1886, are exhibited someof the elements shown and described in this application. My presentclaims are therefore limited to the constructions and organizations ofdevices set forth at the end of this specification.

What I claim as my invention is l. The combination of a burner, anair-heating chamber extending above the burner-.tip and having an outletfor air at its lower end, and an air-conduit arranged within thelburnerand extending up into said chamber above the line of said outlet,substantially as specified.

2. The combination of a burner with an aircasing surrounding it, anairheating chamber extending above the burner-tip and having an outletfor air at its lower end, and an ail" conduit arranged within the burnerand eX- tending up into said chamber and above the line of said outlet,substantially'as specified.

3. The combination of a burner, an air-heat ing chamber extending abovethe burneutip and having an outlet for air at its lower end, anair-conduit arranged withinthe line of the burner-tip, conveying airupwardly into the air-heating chamber, and also delivering air totheinterior of the flame at a point between the burner-tip and lower endof the air-heating chamber, and an inclosing-globe, substantially asspcciiied.

4. The combination of an annular burner, an air-heating chamberextending above the burner-tip and having an outlet for air at its lowerend, an air-conduit arranged Within the burner and extending up intosaid chamber above the line of said outlet, and an air space or passagebetween the inner wall of the burner and the air-tube, substantially asspecified.

5. The combination of a burner, an air-heating chamber extending abovethe burner tip IIO IZO

or tips, an air-conduit arranged within the line ofthe burner tip ortips, conveying air upwardly into the air-heating chamber, and 'anescapeflue the lower or inlet end of which is located above or aroundthe upper part of the air-heating chamber and in such relation to thesame that the tips of the ilaine are swept inward around the upper partof the air-heating chamber, and an inclosing-globe, substantially asspecified.

6. The combination of a burner, an air-heating chamber extending abovethe burner tip or tips, an air-conduit arranged within the line of theburner tip or tips, conveying air upwardly into' the air-heatingchamber, an escape-due the lower or inlet end of which is located aboveor around the upper part of the air-heating chamber and in such relationto the same that the tips ofthe name are swept inward around the upperpart of the airheat ing chamber, and an Iinclosing globe, substantiallyas specified.

7. The combination of a burner, an air-heating chamber located above theburner-tip,hav ing an outlet for air at its lower end, an air conduitarranged within theline of the burnertip,conveying air upwardly into theair-heat ing chambeiyalnd also delivering air to the interior oftheiiame at a point between the tip and the mouth of thev air-heatingchamber, an inclosing-globe, and an escape-flue the inlet end of whichis located above or around the upper part of the air-heating chamber andin such relation to the same that the tips of the flame are swept inwardaround the upper part of this chamber, substantially as specified.

8. The combination of a burner, an air-heating chamber extending abovethe burner tip or tips, an air-conduit arranged within the line of theburner tip or tips, conveying air upwardly into the air-heating chamber,an escape-flue the lower or inlet end of which is located abovevoraround the upper part of the air-heating chamber and in such relation tothe same that the tips of the {iame will be swept inward around theupper part of this chamber, an inolosingglobe,and an ai r-passageleading` to and opening into the globe at or near its top, substantiallyas specified.

9. The combination of aburner, an air-heating chamber extending abovethe burner-tip, having an outlet for air at its lower end, an airconduitarranged within theline of the burnertip, conveying air upwardlyinto theair-heat ing `chamber,and also delivering air to the interior oftheiiame at a point between the tip and the mouth of the air-heatingchamber, an inclosing-globe, an escape-flue the lower or inlet end ofwhich is located above oraround the upper part of the air-heatingchamber and in such relation to the same that the tips of the fiancewill be swept inward around the upper part of this chamber, and anair-passage leading to and opening into the globe at or near its top,substantially as specified.

Signed at Philadelphia, in the county of Philadelphia and State ofPennsylvania, this 18th day of February, A. D. 1886.

CHARLES M. LUN GEEN.

Witnesses:

ALBERT. W. COX, EDWARD S. MCINTYRE.

